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Teledyne API M100E Analyzer Operation Manual Troubleshooting & Repair
275
Ensure that the baud rate, word length, and stop bit settings between modem and analyzer match (refer to
Section 7.3.2.6 and Section 7.1).
Use the RS-2
32 test function to send “w” characters to the modem, terminal or computer. Refer to Section
7.1.11.
Get your term
inal, modem or computer to transmit data to the analyzer (holding down the space bar is one
way). The green LED on the rear panel should flicker as the instrument is receiving data.
Ensure that the communications software is functioning properly.
Further help with serial communications is available in a separate manual “RS-232 Manual”, Teledyne API’s P/N
013500000, available online at http://www.Teledyne-api.com/manuals/.
12.6.9. SHUTTER SYSTEM
To check the functionality of the UV light Shutter by manually activating it:
EXIT 4x’s to return
to the
SAMPLE display
DIAG I / O
33) UVLAMP_SIGNAL= 3.4 MV
PREV NEXT JUMP PRNT EXIT
SAMPLE RANGE = 500.000 PPB SO2 =XXX.X
< TST TST > CAL SETUP
SAMPLE ENTER SETUP PASS : 818
8 1 8 ENTR EXIT
SETUP X.X
PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK MORE EXIT
DIAG SIGNAL I / O
PREV NEXT JUMP
ENTR
EXIT
DIAG I / O
0)
EXT_ZERO_CAL=OFF
PREV NEXT
JUMP
PRNT EXIT
Toggle these keys
until 29 is displayed
DIAG I / O
JUMP TO: 01
2 9 ENTR EXIT
Activate the
Dark Shutter
DIAG I / O
29DARK_SHUTTER=OFF
PREV NEXT JUMP OFF PRNT EXI
T
SETUP X.X
SECONDARY SETUP MENU
COMM VARS DIAG EXIT
EXIT
returns
to the main
SAMPLE
display
DIAG I / O 29DARK_SHUTTER=ON
PREV NEXT JUMP ON PRNT EXIT
DIAG I / O
JUMP TO: 01
33 ENTR
EXIT
Toggle these keys
until 33 is displayed
UV LAMP_SIGNAL
should be
<20 mV
Figure 12-5: Manual Activation of the UV Light Shutter
12.6.10. PMT SENSOR
The photo multiplier tube detects the light emitted by the UV excited fluorescence of SO
2
. It has a gain of about
500000 to 1000000. It is not possible to test the detector outside of the instrument in the field. The best way to
determine if the PMT is working properly is by using the optical test (OTEST), which is described in Section
6.9.5. The basic method to diagnose a PMT fault is to eliminate the
other comp
onents using ETEST, OTEST and
specific tests for other sub-assemblies.
04515F DCN6048